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- 2015
GBJM方法的改进及其在含钉群复合材料结构钉载分配和承载能力分析中的应用
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Abstract:
为了分析含钉群复合材料结构的钉载分配及承载能力问题, 首先对Globle Bolted Joint Model (GBJM)方法进行了改进, 然后采用改进的方法对复合材料多钉连接结构的钉载分配和承载能力进行了预测, 并与试验结果进行了比较。结果表明: 当孔边复合材料未出现损伤时, 该方法对多钉载荷分配的预测和试验结果比较接近;而对结构承载能力的预测, 该方法偏于保守, 比试验结果约低15%。同时该方法具有两个显著优点: 一是计算结构钉载分配时效率高, 和三维有限元模型相比提高约75%;二是能够对含钉群复合材料结构的失效载荷进行有效的预测。 In order to analyze the bolt load distribution and load capacity of composite structures with bolt group, an improved global bolted joint model (GBJM) method was developed firstly, and then the method was applied to predict the bolt load distribution and load capacity of multi-bolt composite joint structures. The prediction values and test results were compared. Results show that the predicted multi-bolt load distribution coincides well with the test results before the onset of composite hole-edge damage; as for the prediction of the load capacity of structures, this method seems to be conservative with 15% lower than the test results. Meanwhile the improved model has two significant advantages: one is high computational efficiency with a 75% rise compared to the three-dimensional finite element models for the calculations of bolt load distribution; the other is that this method is effective for the prediction of failure loads of composite structures with bolt group. 国家自然科学基金(11302099)
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